diff --git a/radicl/info.py b/radicl/info.py
index e6f4989..a2e04c6 100644
--- a/radicl/info.py
+++ b/radicl/info.py
@@ -244,7 +244,9 @@ def __gt__(self, other):
             if v > ov:
                 result = True
                 break
-
+            elif v < ov:
+                result = False
+                break
         return result
 
     def __repr__(self):
diff --git a/radicl/interface.py b/radicl/interface.py
index 46c5e47..01fd817 100644
--- a/radicl/interface.py
+++ b/radicl/interface.py
@@ -6,7 +6,6 @@
 from os.path import abspath, dirname, expanduser, isdir
 
 import pandas as pd
-from matplotlib import pyplot as plt
 from termcolor import colored
 from study_lyte.io import write_csv
 
diff --git a/radicl/probe.py b/radicl/probe.py
index 368d792..b9fcc78 100644
--- a/radicl/probe.py
+++ b/radicl/probe.py
@@ -44,13 +44,13 @@ def __init__(self, ext_api: RAD_API=None, debug=False):
 
         self.debug = debug
         self.api:RAD_API = ext_api
-        self.available_devices = []
+        self.available_devices = None
 
         self.log = get_logger(__name__, debug=self.debug)
 
     def update_devices(self):
         self.log.info("Scanning for COM ports...")
-        self._available_devices = find_kw_port(['STMicroelectronics', 'STM32'])
+        self.available_devices = find_kw_port(['STMicroelectronics', 'STM32'])
 
     @property
     def serial_number(self):
@@ -60,11 +60,18 @@ def serial_number(self):
 
     @property
     def multiple_devices_available(self):
-        return len(self.available_devices) > 1
+        result = False
+        if self.available_devices is not None:
+            result = len(self.available_devices) > 1
+        return result
 
     @property
     def no_devices_available(self):
-        return len(self.available_devices) == 0
+        """ Returns True if no devices are available, False otherwise"""
+        result = True
+        if self.available_devices is not None:
+            result = len(self.available_devices) == 0
+        return result
 
     def connect(self, device=None):
         """ Attempt to establish a connection with the probe"""
diff --git a/tests/test_info.py b/tests/test_info.py
index 9ff1ef8..9a13b97 100644
--- a/tests/test_info.py
+++ b/tests/test_info.py
@@ -58,7 +58,10 @@ def test_firmware_ge(self, fw1, fw2, expected):
         ('0.2', '0.2', False),
         ('0.0.0.2', '0.0.0.1', True),
         ('0.0.0.1', '0.0.0.2', False),
-
+        ('1.45.2.1', '1.46.5', False),
+        ('1.46.2.1', '1.46.1.1', True),
+        ('1.46.2.1', '1.46.2.2', False),
+        ('1.46.2.1', '2', False),
     ])
     def test_firmware_gt(self, fw1, fw2, expected):
         comparison = (fw1 > fw2)